| Title | Validation of MODIS, VEGETATION, and GOES+SSM/I Snow Cover Products over Canada Based on Surface Snow Depth Observations |
| Download | Downloads
(Preprint) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Simic, A; Fernandes, R ; Brown, R; Romanov, P; Park, W M; Hall, D |
| Source | IGARSS 2003, Toulouse, France, July 21-25; 2003 p. 3, https://doi.org/10.4095/220008  Open Access |
| Year | 2003 |
| Alt Series | Earth Sciences Sector, Contribution Series 20043206 |
| Document | book |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Released | 2003 01 01 |
| Abstract | The rate and pattern of snow melt control both hydrological and ecological factors. Snow cover maps derived by different satellite sensors can differ considerably from surface observations due to
different spatial resolutions and snow cover classification algorithms. This article addresses issues related to the validation of three daily snow cover products over Canada: MODIS and GOES+SSM/I snow maps derived at 500m and 4km resolution,
respectively for 2001, and VEGETATION snow maps derived at 1km resolution for 2000. The validation is based on surface snow depth observations from almost two thousand meteorological stations across Canada. The analysis is performed on a daily basis
for the period of six months (January-June). A land cover map of Canada at 1km resolution is used to relate the differences within the validation to land cover types. The SPOT product shows an average agreement of 83% and considerably high percentage
of omission error. The MODIS and GOES+SSM/I products have similar percentage average agreements, 93% and 92%, respectively. Generally, less agreement is seen within the evergreen forest cover types, earlier in the snow season and during snow melt.
The MODIS product exhibits a high percentage commission error for evergreen forests. The GOES+SSM/I product shows relatively similar ratios of omission and commission errors for all land cover types except deciduous forest. |
| GEOSCAN ID | 220008 |
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